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Measuring clock jumps using pulsar timing
Li ZX(李志玄)1,3,4; Lee, KeJia2; Caballero, Ricardo Nicolaos2; Xu YH(徐永华)1,3,4; Hao LF(郝龙飞)1,4; Wang M(汪敏)1,4; Wang JC(王建成)1,4
发表期刊SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
2019-08-22
卷号63期号:1页码:6
DOI10.1007/s11433-019-9428-4
产权排序第1完成单位
收录类别SCI ; EI
关键词pulsars time series analysis clocks and frequency standards
摘要

In this paper, we investigate the statistical signal-processing algorithm to measure the instant local clock jump from the timing data of multiple pulsars. Our algorithm is based on the framework of Bayesian statistics. In order to make the Bayesian algorithm applicable with limited computational resources, we dedicated our efforts to the analytic marginalization of irrelevant parameters. We found that the widely used parameter for pulsar timing systematics, the "Efac" parameter, can be analytically marginalized. This reduces the Gaussian likelihood to a function very similar to the Student's t-distribution. Our iterative method to solve the maximum likelihood estimator is also explained in the paper. Using pulsar timing data from the Yunnan Kunming 40-m radio telescope, we demonstrate the application of the method, where 80-ns level precision for the clock jump can be achieved. Such a precision is comparable to that of current commercial time transferring service using satellites. We expect that the current method could help developing the autonomous pulsar time scale.

资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDB23010200] ; National Natural Science Foundation of China[U15311243] ; National Natural Science Foundation of China[11690024] ; National Basic Research Program of China[2015CB857101] ; Max-Planck Partner Group ; TianShanChuangXinTuanDui
项目资助者Strategic Priority Research Program of Chinese Academy of Sciences[XDB23010200] ; National Natural Science Foundation of China[U15311243, 11690024] ; National Basic Research Program of China[2015CB857101] ; Max-Planck Partner Group ; TianShanChuangXinTuanDui
语种英语
学科领域天文学 ; 射电天文学
学科门类理学 ; 理学::天文学
文章类型Article
出版者SCIENCE PRESS
出版地16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA
ISSN1674-7348
URL查看原文
WOS记录号WOS:000526883800001
WOS研究方向Physics
WOS类目Physics, Multidisciplinary
关键词[WOS]TIME ; PACKAGE ; TEMPO2
EI入藏号20193507375459
EI主题词Iterative Methods
EI分类号657.2extraterrestrial Physics And Stellar Phenomena - 713.4pulse Circuits - 716.1information Theory And Signal Processing - 921.6numerical Methods - 922statistical Methods - 922.2mathematical Statistics - 943.3special Purpose Instruments
引用统计
被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/20847
专题射电天文研究组
中国科学院天体结构与演化重点实验室
通讯作者Lee, KeJia
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650216, China
2.Kavli Institute for Astronomy and Astrophysics, Peking University, 100871, China
3.University of Chinese Academy of Sciences, Beijing, 100049, China
4.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming; 650216, China
第一作者单位中国科学院云南天文台
推荐引用方式
GB/T 7714
Li ZX,Lee, KeJia,Caballero, Ricardo Nicolaos,et al. Measuring clock jumps using pulsar timing[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2019,63(1):6.
APA Li ZX.,Lee, KeJia.,Caballero, Ricardo Nicolaos.,Xu YH.,Hao LF.,...&Wang JC.(2019).Measuring clock jumps using pulsar timing.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,63(1),6.
MLA Li ZX,et al."Measuring clock jumps using pulsar timing".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 63.1(2019):6.
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